Gravitino Warm Dark Matter with Entropy Production

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Gravitinos with a mass in the keV range are an interesting candidate for warm dark matter. Recent measurements of the matter density of the universe and of cosmic structures at the dwarf galaxy scale rule out the simplest gravitino models with thermal freeze-out. We construct a model where the decay of the messenger particles that transmit the supersymmetry breaking to the observable sector generates the required entropy to dilute the gravitino relic density by the required factor of a few to come in line with observations. The model is natural, and requires only that the coupling of the messenger sector ... continued below

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Baltz, Edward A. & Murayama, Hitoshi August 9, 2001.

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Gravitinos with a mass in the keV range are an interesting candidate for warm dark matter. Recent measurements of the matter density of the universe and of cosmic structures at the dwarf galaxy scale rule out the simplest gravitino models with thermal freeze-out. We construct a model where the decay of the messenger particles that transmit the supersymmetry breaking to the observable sector generates the required entropy to dilute the gravitino relic density by the required factor of a few to come in line with observations. The model is natural, and requires only that the coupling of the messenger sector to the standard model be set so that the decay happens at the appropriate time.

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  • Journal Name: Journal of High Energy Physics; Related Information: Journal Publication Date: 30 May 2003

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  • Report No.: LBNL-48726
  • Grant Number: DE-AC02-05CH11231
  • Office of Scientific & Technical Information Report Number: 965505
  • Archival Resource Key: ark:/67531/metadc935203

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Office of Scientific & Technical Information Technical Reports

Reports, articles and other documents harvested from the Office of Scientific and Technical Information.

Office of Scientific and Technical Information (OSTI) is the Department of Energy (DOE) office that collects, preserves, and disseminates DOE-sponsored research and development (R&D) results that are the outcomes of R&D projects or other funded activities at DOE labs and facilities nationwide and grantees at universities and other institutions.

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  • August 9, 2001

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  • Nov. 13, 2016, 7:26 p.m.

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  • Nov. 18, 2016, 2:47 p.m.

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Baltz, Edward A. & Murayama, Hitoshi. Gravitino Warm Dark Matter with Entropy Production, article, August 9, 2001; Berkeley, California. (digital.library.unt.edu/ark:/67531/metadc935203/: accessed April 26, 2018), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.